#!/bin/sh
# Backup script for Calibre-web in a Kubernetes cluster

PROGRAM_NAME='backup_calibre-web'
printlog () {
    printf '%s: %s\n' "${PROGRAM_NAME}" "${1}"
}

BACKUP_DEST='/mnt/PRIVATE_DOCS/BACKUPS/calibre-web'
DATABASE_FILE='/config/app.db'

# Create filename for database backup
database_backupfile="calibre-web-app_$( date +'%Y%m%d' ).db"

# Retrieve container name
base_container="$( docker ps --format '{{.Names}}' | grep tkioskje-calibre-web_tkioskje-calibre-web )"

# Abort entire script if any command fails
set -e

# Database backup
printlog 'Backing up database'
docker cp "${base_container}":"${DATABASE_FILE}" "${BACKUP_DEST}/${database_backupfile}"

# Backup cleanup
# Only keep 30 most recent backups
printlog 'Cleaning up old database backups'
find "${BACKUP_DEST}" -type f -mtime +30 -print -delete

printlog 'Done'